The Secrets of Plant Power

What is the primary function of chloroplasts in photosynthesis?

• To absorb nutrients from the soil

• To convert light energy into chemical energy

• To transport water to the leaves

• To release oxygen into the air

Where in the chloroplast do the light-dependent reactions of photosynthesis take place?

• In the stroma

• In the chlorophyll

• On the thylakoid membranes

• Within the outer membrane

Which of the following is NOT a product of the light-dependent reactions?

• ATP

• NADPH

• Glucose

• Oxygen

What is the role of water in the light-dependent reactions of photosynthesis?

• It provides electrons and protons

• It acts as a primary light absorber

• It is used to make glucose

• It helps in the diffusion of gases

Which gas is taken in by plants during photosynthesis?

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen

What is the main pigment involved in photosynthesis?

• Carotene

• Xanthophyll

• Chlorophyll

• Anthocyanin

How does temperature affect the rate of photosynthesis?

• Photosynthesis stops at high temperatures

• Photosynthesis rate increases indefinitely with temperature

• There is an optimal temperature range for photosynthesis

• Temperature has no effect on photosynthesis

What is the importance of the stroma in the chloroplast?

• It is where the light-dependent reactions take place

• It contains DNA and ribosomes for protein synthesis

• It is where the Calvin cycle takes place

• It stores chlorophyll

Which factor does NOT directly affect the rate of photosynthesis?

• Light intensity

• Chlorophyll concentration

• Soil pH

• Carbon dioxide concentration

What is the role of NADP+ in photosynthesis?

• It acts as a primary electron donor

• It captures light energy

• It transports glucose to other parts of the plant

• It carries electrons and hydrogen ions to form NADPH